I'm trying to figure out what type of projector to get for presentations. I do them about once a month, and in my local area. Portability isn't a huge factor. I have a MacBook 13" with 1280 x 800 resolution. However, I always present with Keynote built in 1024 x 780. I like the 4:3 aspect ratio better for design purposes. Here's my question: if I'm only ever using the 1024 x 780 presentations, is there any reason to get a 1280 x 800 projector? Or would I be fine with an XGA model?